A rare Turkish hawk guides Leonardo to Al-Rahim, who tells him to embark in a ship called the Basilisk, which he will be able to guide to the place the Book of Leaves is hidden using Cosimo's hidden astrolabe. He tells Leonardo that his choice is to embark and triumph or not do it and fail. Meanwhile, in Florence, Giuliano is late for his wedding after being missing for several days and Lorenzo orders Dragonetti to find him. Francesco Pazzi wants to kill Lorenzo already, but Riario does not want to make him a martyr. Vanessa discovers she's pregnant with Giuliano's child while he wakes up after being saved by a poor man. With his master's help, Leonardo discovers the secrets of Cosimo's tomb and retrieves the hidden astrolabe.